A remote controllable power outlet apparatus with grouping capability and a remote control grouping method thereof, includes a microprocessor, a communication module, a power protection and control module, a grouping unit, at least a controllable socket set, a switch, and an original remote control which belongs and corresponds to the remote controllable power outlet apparatus. Therein the switch is coupled between the microprocessor, the power protection and control module, and the controllable socket set, and the switch is for controlling whether or not the controllable socket set provides power. When the original remote control is plugged into the grouping unit, the remote controllable power outlet apparatus then activates a remote control grouping function, and the remote controllable power outlet apparatus can be controlled by another remote control other then the original remote control.